Patent · US Expired

Method and apparatus for analysis of chemical constituents in an electrolysis cell

US6639667B1 · kind B1 · utility

1Cited by

3References

16Claims

0Family size

Assignee

NORSK HYDRO ASA · NO

Inventors

Bernard S. Gilbert · Palm Bay, US
Trygve Foosnæs · Sogndal, NO
Reidar Huglen · Vormedal, NO

Key dates

Filing date	Jul 18, 2001
Grant date	Oct 28, 2003
Priority date	—
Expiry date	Jul 18, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25C3/06
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Method for determining chemical constituents in an electrolysis cell for the production of metal, in particular aluminum, involving the use of light spectroscopy such as Raman spectroscopy that analyses the light emitted from the cell constituents and represents the light as a spectrum, wherein the analysis is performed directly in the cell while the cell is in its production mode, whereby the spectrum is analysed on the basis of reference spectrums based on known compositions, to determine chemical constituents in the cell. Also provided is an apparatus for performing this method.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.